Rutger Gunnarsson, the bass player on every Abba album and tour, has died in Sweden at age 69. Gunnarson worked with Björn Ulvaeus pre-Abba in the Hootenanny Singers. Post Abba he continued to work with Ulvaeus including Bjorn’s rock opera ‘Chess’. His credits also appear on records for Celine Dion, Westlife, Elton John, Adam Ant